@jeo. Thanks for posting. Seems like you want to make a very custom solution for your site. If you want, you can just edit the helper.php file to do what you want it to do. I believe that most, if not all, of my code is self explanatory. You should be able to follow it.
You can also make a custom template file in the tmpl folder. Just copy and paste the default.php file and rename it, then edit it to add a specific url to the uploaded file.